I just wanted to show you (and the community) what I did to my PC1600x. It's
a "workaround" for all the virtual synths I'm running on an iMac computer
which is controlled by cubase on an G3 Mac (they are connected/sequenced via
two Emagic MIDI interfaces). I was in trouble re-finding the correct sliders
when I changed the synth. So I ripped out the middle of my old Filofax and
glued it to a piece of heavy cardboard. This was sticked onto the PC1600x
with a double sided glue-tape. Luckily I had a perforator for the Filofax
measures. So I could design my setups in FreeHand, print them out, cut the
papers to size and perforate them to match into the old Filofax handle. See
the pictures I included to get the skill.

Nice greetings from Munich, Germany
(Yes, the OKTOBERFEST is still running...sigh!)